16010663667

Committed 01 Jul 2025 09:35PM UTC coverage: 87.43% (+0.3%) from 87.105%

Build # 16010663667

Build Type

Pull #237

github

Committed by

web-flow

Commit Message

Merge 49322a759 into 74c251759

Pull Request Pull Request #237: fix: Force group levels to be explicitly given

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/src/snippet.rs

//! Structures used as an input for the library.

use crate::renderer::source_map::SourceMap;
use crate::Level;
use std::borrow::Cow;
use std::ops::Range;

pub(crate) const ERROR_TXT: &str = "error";
pub(crate) const HELP_TXT: &str = "help";
pub(crate) const INFO_TXT: &str = "info";
pub(crate) const NOTE_TXT: &str = "note";
pub(crate) const WARNING_TXT: &str = "warning";

#[derive(Clone, Debug, Default)]
pub(crate) struct Id<'a> {
    pub(crate) id: Option<Cow<'a, str>>,
    pub(crate) url: Option<Cow<'a, str>>,
}

/// An [`Element`] container
#[derive(Clone, Debug)]
pub struct Group<'a> {
    pub(crate) primary_level: Level<'a>,
    pub(crate) elements: Vec<Element<'a>>,
}

impl<'a> Group<'a> {
    /// Create group with a title, deriving the primary [`Level`] for [`Annotation`]s from it
    pub fn with_title(title: Title<'a>) -> Self {
        let level = title.level.clone();
        Self::with_level(level).element(title)
    }

    /// Create a title-less group with a primary [`Level`] for [`Annotation`]s
    pub fn with_level(level: Level<'a>) -> Self {
        Self {
            primary_level: level,
            elements: vec![],
        }
    }

    pub fn element(mut self, section: impl Into<Element<'a>>) -> Self {
        self.elements.push(section.into());
        self
    }

    pub fn elements(mut self, sections: impl IntoIterator<Item = impl Into<Element<'a>>>) -> Self {
        self.elements.extend(sections.into_iter().map(Into::into));
        self
    }

    pub fn is_empty(&self) -> bool {
        self.elements.is_empty()
    }
}

/// A section of content within a [`Group`]
#[derive(Clone, Debug)]
#[non_exhaustive]
pub enum Element<'a> {
    Title(Title<'a>),
    Cause(Snippet<'a, Annotation<'a>>),
    Suggestion(Snippet<'a, Patch<'a>>),
    Origin(Origin<'a>),
    Padding(Padding),
}

impl<'a> From<Title<'a>> for Element<'a> {
    fn from(value: Title<'a>) -> Self {
        Element::Title(value)
    }
}

impl<'a> From<Snippet<'a, Annotation<'a>>> for Element<'a> {
    fn from(value: Snippet<'a, Annotation<'a>>) -> Self {
        Element::Cause(value)
    }
}

impl<'a> From<Snippet<'a, Patch<'a>>> for Element<'a> {
    fn from(value: Snippet<'a, Patch<'a>>) -> Self {
        Element::Suggestion(value)
    }
}

impl<'a> From<Origin<'a>> for Element<'a> {
    fn from(value: Origin<'a>) -> Self {
        Element::Origin(value)
    }
}

impl From<Padding> for Element<'_> {
    fn from(value: Padding) -> Self {
        Self::Padding(value)
    }
}

/// A whitespace [`Element`] in a [`Group`]
#[derive(Clone, Debug)]
pub struct Padding;

/// A text [`Element`] in a [`Group`]
///
/// See [`Level::title`] to create this.
#[derive(Clone, Debug)]
pub struct Title<'a> {
    pub(crate) level: Level<'a>,
    pub(crate) id: Option<Id<'a>>,
    pub(crate) title: Cow<'a, str>,
    pub(crate) is_pre_styled: bool,
}

impl<'a> Title<'a> {
    /// <div class="warning">
    ///
    /// This is only relevant if the title is the first element of a group.
    ///
    /// </div>
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn id(mut self, id: impl Into<Cow<'a, str>>) -> Self {
        self.id.get_or_insert(Id::default()).id = Some(id.into());
        self
    }

    /// <div class="warning">
    ///
    /// This is only relevant if the title is the first element of a group and
    /// `id` present
    ///
    /// </div>
    pub fn id_url(mut self, url: impl Into<Cow<'a, str>>) -> Self {
        self.id.get_or_insert(Id::default()).url = Some(url.into());
        self
    }
}

/// A source view [`Element`] in a [`Group`]
///
/// If you do not have [source][Snippet::source] available, see instead [`Origin`]
#[derive(Clone, Debug)]
pub struct Snippet<'a, T> {
    pub(crate) path: Option<Cow<'a, str>>,
    pub(crate) line_start: usize,
    pub(crate) source: Cow<'a, str>,
    pub(crate) markers: Vec<T>,
    pub(crate) fold: bool,
}

impl<'a, T: Clone> Snippet<'a, T> {
    /// The source code to be rendered
    ///
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn source(source: impl Into<Cow<'a, str>>) -> Self {
        Self {
            path: None,
            line_start: 1,
            source: source.into(),
            markers: vec![],
            fold: false,
        }
    }

    /// When manually [`fold`][Self::fold]ing,
    /// the [`source`][Self::source]s line offset from the original start
    pub fn line_start(mut self, line_start: usize) -> Self {
        self.line_start = line_start;
        self
    }

    /// The location of the [`source`][Self::source] (e.g. a path)
    ///
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn path(mut self, path: impl Into<OptionCow<'a>>) -> Self {
        self.path = path.into().0;
        self
    }

    /// Hide lines without [`Annotation`]s
    pub fn fold(mut self, fold: bool) -> Self {
        self.fold = fold;
        self
    }
}

impl<'a> Snippet<'a, Annotation<'a>> {
    /// Highlight and describe a span of text within the [`source`][Self::source]
    pub fn annotation(mut self, annotation: Annotation<'a>) -> Snippet<'a, Annotation<'a>> {
        self.markers.push(annotation);
        self
    }

    /// Highlight and describe spans of text within the [`source`][Self::source]
    pub fn annotations(mut self, annotation: impl IntoIterator<Item = Annotation<'a>>) -> Self {
        self.markers.extend(annotation);
        self
    }
}

impl<'a> Snippet<'a, Patch<'a>> {
    /// Suggest to the user an edit to the [`source`][Self::source]
    pub fn patch(mut self, patch: Patch<'a>) -> Snippet<'a, Patch<'a>> {
        self.markers.push(patch);
        self
    }

    /// Suggest to the user edits to the [`source`][Self::source]
    pub fn patches(mut self, patches: impl IntoIterator<Item = Patch<'a>>) -> Self {
        self.markers.extend(patches);
        self
    }
}

/// Highlighted and describe a span of text within a [`Snippet`]
///
/// See [`AnnotationKind`] to create an annotation.
#[derive(Clone, Debug)]
pub struct Annotation<'a> {
    pub(crate) span: Range<usize>,
    pub(crate) label: Option<Cow<'a, str>>,
    pub(crate) kind: AnnotationKind,
    pub(crate) highlight_source: bool,
}

impl<'a> Annotation<'a> {
    /// Describe the reason the span is highlighted
    ///
    /// This will be styled according to the [`AnnotationKind`]
    ///
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn label(mut self, label: impl Into<OptionCow<'a>>) -> Self {
        self.label = label.into().0;
        self
    }

    /// Style the source according to the [`AnnotationKind`]
    pub fn highlight_source(mut self, highlight_source: bool) -> Self {
        self.highlight_source = highlight_source;
        self
    }
}

/// The category of the [`Annotation`]
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
#[non_exhaustive]
pub enum AnnotationKind {
    /// Match the primary [`Level`] of the group.
    ///
    /// See [`Group::with_level`] for details about how this is determined
    Primary,
    /// Additional context to explain the [`Primary`][Self::Primary]
    /// [`Annotation`]
    ///
    /// See also [`Renderer::context`].
    ///
    /// [`Renderer::context`]: crate::renderer::Renderer
    Context,
}

impl AnnotationKind {
    pub fn span<'a>(self, span: Range<usize>) -> Annotation<'a> {
        Annotation {
            span,
            label: None,
            kind: self,
            highlight_source: false,
        }
    }

    pub(crate) fn is_primary(&self) -> bool {
        matches!(self, AnnotationKind::Primary)
    }
}

/// Suggested edit to the [`Snippet`]
#[derive(Clone, Debug)]
pub struct Patch<'a> {
    pub(crate) span: Range<usize>,
    pub(crate) replacement: Cow<'a, str>,
}

impl<'a> Patch<'a> {
    /// Splice `replacement` into the [`Snippet`] at the `span`
    ///
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn new(span: Range<usize>, replacement: impl Into<Cow<'a, str>>) -> Self {
        Self {
            span,
            replacement: replacement.into(),
        }
    }

    pub(crate) fn is_addition(&self, sm: &SourceMap<'_>) -> bool {
        !self.replacement.is_empty() && !self.replaces_meaningful_content(sm)
    }

    pub(crate) fn is_deletion(&self, sm: &SourceMap<'_>) -> bool {
        self.replacement.trim().is_empty() && self.replaces_meaningful_content(sm)
    }

    pub(crate) fn is_replacement(&self, sm: &SourceMap<'_>) -> bool {
        !self.replacement.is_empty() && self.replaces_meaningful_content(sm)
    }

    /// Whether this is a replacement that overwrites source with a snippet
    /// in a way that isn't a superset of the original string. For example,
    /// replacing "abc" with "abcde" is not destructive, but replacing it
    /// it with "abx" is, since the "c" character is lost.
    pub(crate) fn is_destructive_replacement(&self, sm: &SourceMap<'_>) -> bool {
        self.is_replacement(sm)
            && !sm
                .span_to_snippet(self.span.clone())
                // This should use `is_some_and` when our MSRV is >= 1.70
                .map_or(false, |s| {
                    as_substr(s.trim(), self.replacement.trim()).is_some()
                })
    }

    fn replaces_meaningful_content(&self, sm: &SourceMap<'_>) -> bool {
        sm.span_to_snippet(self.span.clone())
            .map_or(!self.span.is_empty(), |snippet| !snippet.trim().is_empty())
    }

    /// Try to turn a replacement into an addition when the span that is being
    /// overwritten matches either the prefix or suffix of the replacement.
    pub(crate) fn trim_trivial_replacements(&mut self, sm: &'a SourceMap<'a>) {
        if self.replacement.is_empty() {
            return;
        }
        let Some(snippet) = sm.span_to_snippet(self.span.clone()) else {
            return;
        };

        if let Some((prefix, substr, suffix)) = as_substr(snippet, &self.replacement) {
            self.span = self.span.start + prefix..self.span.end.saturating_sub(suffix);
            self.replacement = Cow::Owned(substr.to_owned());
        }
    }
}

/// The referenced location (e.g. a path)
///
/// If you have source available, see instead [`Snippet`]
#[derive(Clone, Debug)]
pub struct Origin<'a> {
    pub(crate) path: Cow<'a, str>,
    pub(crate) line: Option<usize>,
    pub(crate) char_column: Option<usize>,
    pub(crate) primary: bool,
}

impl<'a> Origin<'a> {
    /// <div class="warning">
    ///
    /// Text passed to this function is considered "untrusted input", as such
    /// all text is passed through a normalization function. Pre-styled text is
    /// not allowed to be passed to this function.
    ///
    /// </div>
    pub fn new(path: impl Into<Cow<'a, str>>) -> Self {
        Self {
            path: path.into(),
            line: None,
            char_column: None,
            primary: false,
        }
    }

    /// Set the default line number to display
    ///
    /// Otherwise this will be inferred from the primary [`Annotation`]
    pub fn line(mut self, line: usize) -> Self {
        self.line = Some(line);
        self
    }

    /// Set the default column to display
    ///
    /// Otherwise this will be inferred from the primary [`Annotation`]
    ///
    /// <div class="warning">
    ///
    /// `char_column` is only be respected if [`Origin::line`] is also set.
    ///
    /// </div>
    pub fn char_column(mut self, char_column: usize) -> Self {
        self.char_column = Some(char_column);
        self
    }

    pub fn primary(mut self, primary: bool) -> Self {
        self.primary = primary;
        self
    }
}

impl<'a> From<Cow<'a, str>> for Origin<'a> {
    fn from(origin: Cow<'a, str>) -> Self {
        Self::new(origin)
    }
}

#[derive(Debug)]
pub struct OptionCow<'a>(pub(crate) Option<Cow<'a, str>>);

impl<'a, T: Into<Cow<'a, str>>> From<Option<T>> for OptionCow<'a> {
    fn from(value: Option<T>) -> Self {
        Self(value.map(Into::into))
    }
}

impl<'a> From<&'a Cow<'a, str>> for OptionCow<'a> {
    fn from(value: &'a Cow<'a, str>) -> Self {
        Self(Some(Cow::Borrowed(value)))
    }
}

impl<'a> From<Cow<'a, str>> for OptionCow<'a> {
    fn from(value: Cow<'a, str>) -> Self {
        Self(Some(value))
    }
}

impl<'a> From<&'a str> for OptionCow<'a> {
    fn from(value: &'a str) -> Self {
        Self(Some(Cow::Borrowed(value)))
    }
}
impl<'a> From<String> for OptionCow<'a> {
    fn from(value: String) -> Self {
        Self(Some(Cow::Owned(value)))
    }
}

impl<'a> From<&'a String> for OptionCow<'a> {
    fn from(value: &'a String) -> Self {
        Self(Some(Cow::Borrowed(value.as_str())))
    }
}

/// Given an original string like `AACC`, and a suggestion like `AABBCC`, try to detect
/// the case where a substring of the suggestion is "sandwiched" in the original, like
/// `BB` is. Return the length of the prefix, the "trimmed" suggestion, and the length
/// of the suffix.
fn as_substr<'a>(original: &'a str, suggestion: &'a str) -> Option<(usize, &'a str, usize)> {
    let common_prefix = original
        .chars()
        .zip(suggestion.chars())
        .take_while(|(c1, c2)| c1 == c2)
        .map(|(c, _)| c.len_utf8())
        .sum();
    let original = &original[common_prefix..];
    let suggestion = &suggestion[common_prefix..];
    if let Some(stripped) = suggestion.strip_suffix(original) {
        let common_suffix = original.len();
        Some((common_prefix, stripped, common_suffix))
    } else {
        None
    }
}

1	//! Structures used as an input for the library.
2
3	use crate::renderer::source_map::SourceMap;
4	use crate::Level;
5	use std::borrow::Cow;
6	use std::ops::Range;
7
8	pub(crate) const ERROR_TXT: &str = "error";
9	pub(crate) const HELP_TXT: &str = "help";
10	pub(crate) const INFO_TXT: &str = "info";
11	pub(crate) const NOTE_TXT: &str = "note";
12	pub(crate) const WARNING_TXT: &str = "warning";
13
14	#[derive(Clone, Debug, Default)]
15	pub(crate) struct Id<'a> {
16	pub(crate) id: Option<Cow<'a, str>>,
17	pub(crate) url: Option<Cow<'a, str>>,
18	}
19
20	/// An [`Element`] container
21	#[derive(Clone, Debug)]
22	pub struct Group<'a> {
23	pub(crate) primary_level: Level<'a>,
24	pub(crate) elements: Vec<Element<'a>>,
25	}
26
27	impl<'a> Group<'a> {
28	/// Create group with a title, deriving the primary [`Level`] for [`Annotation`]s from it
29	pub fn with_title(title: Title<'a>) -> Self {	9✔
30	let level = title.level.clone();	9✔
31	Self::with_level(level).element(title)	9✔
32	}
33
34	/// Create a title-less group with a primary [`Level`] for [`Annotation`]s
35	pub fn with_level(level: Level<'a>) -> Self {	9✔
36	Self {
37	primary_level: level,
38	elements: vec![],	12✔
39	}
40	}
41
42	pub fn element(mut self, section: impl Into<Element<'a>>) -> Self {	30✔
43	self.elements.push(section.into());	64✔
44	self	32✔
45	}
46
47	pub fn elements(mut self, sections: impl IntoIterator<Item = impl Into<Element<'a>>>) -> Self {	×
48	self.elements.extend(sections.into_iter().map(Into::into));	×
49	self	×
50	}
51
UNCOV 52	pub fn is_empty(&self) -> bool {	×
UNCOV 53	self.elements.is_empty()	×
54	}
55	}
56
57	/// A section of content within a [`Group`]
58	#[derive(Clone, Debug)]
59	#[non_exhaustive]
60	pub enum Element<'a> {
61	Title(Title<'a>),
62	Cause(Snippet<'a, Annotation<'a>>),
63	Suggestion(Snippet<'a, Patch<'a>>),
64	Origin(Origin<'a>),
65	Padding(Padding),
66	}
67
68	impl<'a> From<Title<'a>> for Element<'a> {
69	fn from(value: Title<'a>) -> Self {	12✔
70	Element::Title(value)	12✔
71	}
72	}
73
74	impl<'a> From<Snippet<'a, Annotation<'a>>> for Element<'a> {
75	fn from(value: Snippet<'a, Annotation<'a>>) -> Self {	12✔
76	Element::Cause(value)	12✔
77	}
78	}
79
80	impl<'a> From<Snippet<'a, Patch<'a>>> for Element<'a> {
81	fn from(value: Snippet<'a, Patch<'a>>) -> Self {	5✔
82	Element::Suggestion(value)	5✔
83	}
84	}
85
86	impl<'a> From<Origin<'a>> for Element<'a> {
87	fn from(value: Origin<'a>) -> Self {	2✔
88	Element::Origin(value)	2✔
89	}
90	}
91
92	impl From<Padding> for Element<'_> {
93	fn from(value: Padding) -> Self {	1✔
94	Self::Padding(value)	1✔
95	}
96	}
97
98	/// A whitespace [`Element`] in a [`Group`]
99	#[derive(Clone, Debug)]
100	pub struct Padding;
101
102	/// A text [`Element`] in a [`Group`]
103	///
104	/// See [`Level::title`] to create this.
105	#[derive(Clone, Debug)]
106	pub struct Title<'a> {
107	pub(crate) level: Level<'a>,
108	pub(crate) id: Option<Id<'a>>,
109	pub(crate) title: Cow<'a, str>,
110	pub(crate) is_pre_styled: bool,
111	}
112
113	impl<'a> Title<'a> {
114	/// <div class="warning">
115	///
116	/// This is only relevant if the title is the first element of a group.
117	///
118	/// </div>
119	/// <div class="warning">
120	///
121	/// Text passed to this function is considered "untrusted input", as such
122	/// all text is passed through a normalization function. Pre-styled text is
123	/// not allowed to be passed to this function.
124	///
125	/// </div>
126	pub fn id(mut self, id: impl Into<Cow<'a, str>>) -> Self {	4✔
127	self.id.get_or_insert(Id::default()).id = Some(id.into());	12✔
128	self	6✔
129	}
130
131	/// <div class="warning">
132	///
133	/// This is only relevant if the title is the first element of a group and
134	/// `id` present
135	///
136	/// </div>
137	pub fn id_url(mut self, url: impl Into<Cow<'a, str>>) -> Self {	×
138	self.id.get_or_insert(Id::default()).url = Some(url.into());	×
139	self	×
140	}
141	}
142
143	/// A source view [`Element`] in a [`Group`]
144	///
145	/// If you do not have [source][Snippet::source] available, see instead [`Origin`]
146	#[derive(Clone, Debug)]
147	pub struct Snippet<'a, T> {
148	pub(crate) path: Option<Cow<'a, str>>,
149	pub(crate) line_start: usize,
150	pub(crate) source: Cow<'a, str>,
151	pub(crate) markers: Vec<T>,
152	pub(crate) fold: bool,
153	}
154
155	impl<'a, T: Clone> Snippet<'a, T> {
156	/// The source code to be rendered
157	///
158	/// <div class="warning">
159	///
160	/// Text passed to this function is considered "untrusted input", as such
161	/// all text is passed through a normalization function. Pre-styled text is
162	/// not allowed to be passed to this function.
163	///
164	/// </div>
165	pub fn source(source: impl Into<Cow<'a, str>>) -> Self {	18✔
166	Self {
167	path: None,
168	line_start: 1,
169	source: source.into(),	18✔
170	markers: vec![],	18✔
171	fold: false,
172	}
173	}
174
175	/// When manually [`fold`][Self::fold]ing,
176	/// the [`source`][Self::source]s line offset from the original start
177	pub fn line_start(mut self, line_start: usize) -> Self {	13✔
178	self.line_start = line_start;	13✔
179	self	13✔
180	}
181
182	/// The location of the [`source`][Self::source] (e.g. a path)
183	///
184	/// <div class="warning">
185	///
186	/// Text passed to this function is considered "untrusted input", as such
187	/// all text is passed through a normalization function. Pre-styled text is
188	/// not allowed to be passed to this function.
189	///
190	/// </div>
191	pub fn path(mut self, path: impl Into<OptionCow<'a>>) -> Self {	14✔
192	self.path = path.into().0;	26✔
193	self	14✔
194	}
195
196	/// Hide lines without [`Annotation`]s
197	pub fn fold(mut self, fold: bool) -> Self {	10✔
198	self.fold = fold;	10✔
199	self	10✔
200	}
201	}
202
203	impl<'a> Snippet<'a, Annotation<'a>> {
204	/// Highlight and describe a span of text within the [`source`][Self::source]
205	pub fn annotation(mut self, annotation: Annotation<'a>) -> Snippet<'a, Annotation<'a>> {	10✔
206	self.markers.push(annotation);	10✔
207	self	10✔
208	}
209
210	/// Highlight and describe spans of text within the [`source`][Self::source]
211	pub fn annotations(mut self, annotation: impl IntoIterator<Item = Annotation<'a>>) -> Self {	×
212	self.markers.extend(annotation);	×
213	self	×
214	}
215	}
216
217	impl<'a> Snippet<'a, Patch<'a>> {
218	/// Suggest to the user an edit to the [`source`][Self::source]
219	pub fn patch(mut self, patch: Patch<'a>) -> Snippet<'a, Patch<'a>> {	5✔
220	self.markers.push(patch);	5✔
221	self	5✔
222	}
223
224	/// Suggest to the user edits to the [`source`][Self::source]
225	pub fn patches(mut self, patches: impl IntoIterator<Item = Patch<'a>>) -> Self {	×
226	self.markers.extend(patches);	×
227	self	×
228	}
229	}
230
231	/// Highlighted and describe a span of text within a [`Snippet`]
232	///
233	/// See [`AnnotationKind`] to create an annotation.
234	#[derive(Clone, Debug)]
235	pub struct Annotation<'a> {
236	pub(crate) span: Range<usize>,
237	pub(crate) label: Option<Cow<'a, str>>,
238	pub(crate) kind: AnnotationKind,
239	pub(crate) highlight_source: bool,
240	}
241
242	impl<'a> Annotation<'a> {
243	/// Describe the reason the span is highlighted
244	///
245	/// This will be styled according to the [`AnnotationKind`]
246	///
247	/// <div class="warning">
248	///
249	/// Text passed to this function is considered "untrusted input", as such
250	/// all text is passed through a normalization function. Pre-styled text is
251	/// not allowed to be passed to this function.
252	///
253	/// </div>
254	pub fn label(mut self, label: impl Into<OptionCow<'a>>) -> Self {	7✔
255	self.label = label.into().0;	16✔
256	self	10✔
257	}
258
259	/// Style the source according to the [`AnnotationKind`]
260	pub fn highlight_source(mut self, highlight_source: bool) -> Self {	×
261	self.highlight_source = highlight_source;	×
262	self	×
263	}
264	}
265
266	/// The category of the [`Annotation`]
267	#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
268	#[non_exhaustive]
269	pub enum AnnotationKind {
270	/// Match the primary [`Level`] of the group.
271	///
272	/// See [`Group::with_level`] for details about how this is determined
273	Primary,
274	/// Additional context to explain the [`Primary`][Self::Primary]
275	/// [`Annotation`]
276	///
277	/// See also [`Renderer::context`].
278	///
279	/// [`Renderer::context`]: crate::renderer::Renderer
280	Context,
281	}
282
283	impl AnnotationKind {
284	pub fn span<'a>(self, span: Range<usize>) -> Annotation<'a> {	10✔
285	Annotation {
286	span,
287	label: None,
288	kind: self,
289	highlight_source: false,
290	}
291	}
292
293	pub(crate) fn is_primary(&self) -> bool {	5✔
294	matches!(self, AnnotationKind::Primary)	7✔
295	}
296	}
297
298	/// Suggested edit to the [`Snippet`]
299	#[derive(Clone, Debug)]
300	pub struct Patch<'a> {
301	pub(crate) span: Range<usize>,
302	pub(crate) replacement: Cow<'a, str>,
303	}
304
305	impl<'a> Patch<'a> {
306	/// Splice `replacement` into the [`Snippet`] at the `span`
307	///
308	/// <div class="warning">
309	///
310	/// Text passed to this function is considered "untrusted input", as such
311	/// all text is passed through a normalization function. Pre-styled text is
312	/// not allowed to be passed to this function.
313	///
314	/// </div>
315	pub fn new(span: Range<usize>, replacement: impl Into<Cow<'a, str>>) -> Self {	4✔
316	Self {
317	span,
318	replacement: replacement.into(),	5✔
319	}
320	}
321
322	pub(crate) fn is_addition(&self, sm: &SourceMap<'_>) -> bool {	3✔
323	!self.replacement.is_empty() && !self.replaces_meaningful_content(sm)	3✔
324	}
325
326	pub(crate) fn is_deletion(&self, sm: &SourceMap<'_>) -> bool {	3✔
327	self.replacement.trim().is_empty() && self.replaces_meaningful_content(sm)	5✔
328	}
329
330	pub(crate) fn is_replacement(&self, sm: &SourceMap<'_>) -> bool {	2✔
331	!self.replacement.is_empty() && self.replaces_meaningful_content(sm)	3✔
332	}
333
334	/// Whether this is a replacement that overwrites source with a snippet
335	/// in a way that isn't a superset of the original string. For example,
336	/// replacing "abc" with "abcde" is not destructive, but replacing it
337	/// it with "abx" is, since the "c" character is lost.
338	pub(crate) fn is_destructive_replacement(&self, sm: &SourceMap<'_>) -> bool {	2✔
339	self.is_replacement(sm)	4✔
340	&& !sm	2✔
341	.span_to_snippet(self.span.clone())	3✔
342	// This should use `is_some_and` when our MSRV is >= 1.70
343	.map_or(false, \|s\| {	3✔
344	as_substr(s.trim(), self.replacement.trim()).is_some()	2✔
345	})
346	}
347
348	fn replaces_meaningful_content(&self, sm: &SourceMap<'_>) -> bool {	3✔
349	sm.span_to_snippet(self.span.clone())	9✔
350	.map_or(!self.span.is_empty(), \|snippet\| !snippet.trim().is_empty())	11✔
351	}
352
353	/// Try to turn a replacement into an addition when the span that is being
354	/// overwritten matches either the prefix or suffix of the replacement.
355	pub(crate) fn trim_trivial_replacements(&mut self, sm: &'a SourceMap<'a>) {	4✔
356	if self.replacement.is_empty() {	4✔
357	return;	×
358	}
359	let Some(snippet) = sm.span_to_snippet(self.span.clone()) else {	6✔
360	return;	×
361	};
362
363	if let Some((prefix, substr, suffix)) = as_substr(snippet, &self.replacement) {	6✔
364	self.span = self.span.start + prefix..self.span.end.saturating_sub(suffix);	2✔
365	self.replacement = Cow::Owned(substr.to_owned());	5✔
366	}
367	}
368	}
369
370	/// The referenced location (e.g. a path)
371	///
372	/// If you have source available, see instead [`Snippet`]
373	#[derive(Clone, Debug)]
374	pub struct Origin<'a> {
375	pub(crate) path: Cow<'a, str>,
376	pub(crate) line: Option<usize>,
377	pub(crate) char_column: Option<usize>,
378	pub(crate) primary: bool,
379	}
380
381	impl<'a> Origin<'a> {
382	/// <div class="warning">
383	///
384	/// Text passed to this function is considered "untrusted input", as such
385	/// all text is passed through a normalization function. Pre-styled text is
386	/// not allowed to be passed to this function.
387	///
388	/// </div>
389	pub fn new(path: impl Into<Cow<'a, str>>) -> Self {	5✔
390	Self {
391	path: path.into(),	3✔
392	line: None,
393	char_column: None,
394	primary: false,
395	}
396	}
397
398	/// Set the default line number to display
399	///
400	/// Otherwise this will be inferred from the primary [`Annotation`]
401	pub fn line(mut self, line: usize) -> Self {	2✔
402	self.line = Some(line);	2✔
403	self	2✔
404	}
405
406	/// Set the default column to display
407	///
408	/// Otherwise this will be inferred from the primary [`Annotation`]
409	///
410	/// <div class="warning">
411	///
412	/// `char_column` is only be respected if [`Origin::line`] is also set.
413	///
414	/// </div>
415	pub fn char_column(mut self, char_column: usize) -> Self {	2✔
416	self.char_column = Some(char_column);	2✔
417	self	2✔
418	}
419
420	pub fn primary(mut self, primary: bool) -> Self {	1✔
421	self.primary = primary;	1✔
422	self	1✔
423	}
424	}
425
426	impl<'a> From<Cow<'a, str>> for Origin<'a> {
427	fn from(origin: Cow<'a, str>) -> Self {	×
428	Self::new(origin)	×
429	}
430	}
431
432	#[derive(Debug)]
433	pub struct OptionCow<'a>(pub(crate) Option<Cow<'a, str>>);
434
435	impl<'a, T: Into<Cow<'a, str>>> From<Option<T>> for OptionCow<'a> {
436	fn from(value: Option<T>) -> Self {	1✔
437	Self(value.map(Into::into))	1✔
438	}
439	}
440
441	impl<'a> From<&'a Cow<'a, str>> for OptionCow<'a> {
442	fn from(value: &'a Cow<'a, str>) -> Self {	×
443	Self(Some(Cow::Borrowed(value)))	×
444	}
445	}
446
447	impl<'a> From<Cow<'a, str>> for OptionCow<'a> {
448	fn from(value: Cow<'a, str>) -> Self {	×
449	Self(Some(value))	×
450	}
451	}
452
453	impl<'a> From<&'a str> for OptionCow<'a> {
454	fn from(value: &'a str) -> Self {	7✔
455	Self(Some(Cow::Borrowed(value)))	10✔
456	}
457	}
458	impl<'a> From<String> for OptionCow<'a> {
459	fn from(value: String) -> Self {	×
460	Self(Some(Cow::Owned(value)))	×
461	}
462	}
463
464	impl<'a> From<&'a String> for OptionCow<'a> {
465	fn from(value: &'a String) -> Self {	×
466	Self(Some(Cow::Borrowed(value.as_str())))	×
467	}
468	}
469
470	/// Given an original string like `AACC`, and a suggestion like `AABBCC`, try to detect
471	/// the case where a substring of the suggestion is "sandwiched" in the original, like
472	/// `BB` is. Return the length of the prefix, the "trimmed" suggestion, and the length
473	/// of the suffix.
474	fn as_substr<'a>(original: &'a str, suggestion: &'a str) -> Option<(usize, &'a str, usize)> {	3✔
475	let common_prefix = original	6✔
476	.chars()
477	.zip(suggestion.chars())	3✔
478	.take_while(\|(c1, c2)\| c1 == c2)	6✔
479	.map(\|(c, _)\| c.len_utf8())	4✔
480	.sum();
481	let original = &original[common_prefix..];	2✔
482	let suggestion = &suggestion[common_prefix..];	2✔
483	if let Some(stripped) = suggestion.strip_suffix(original) {	6✔
484	let common_suffix = original.len();	2✔
485	Some((common_prefix, stripped, common_suffix))	2✔
486	} else {
487	None	3✔
488	}
489	}

rust-lang / annotate-snippets-rs / 16010663667

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